Assembly joint structure of a long handle and a scraper top for a scraping tool

ABSTRACT

The invention is related to an assembly joint structure of a long handle and a scraper top for a scraping tool. In general, it contains a long handle for hand grip and a scraper top in the front. In the invention, the rear central section of the scraper top has a connecting column of suitable length. On the connecting column, there are two through holes. In the front of the long handle, there is a connecting hole that has the same inner diameter as the outer diameter of the connecting column. On the wall of the connecting hole there are corresponding through holes. When the scraper top inserts the connecting column into the connecting hole of the long handle, rivets can be put in the through holes to constitute an assembly joint structure between the long handle and the scraper top.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention is related to a scraping tool that is used to removeresidual materials on wall or ground. Especially, it refers to anassembly joint structure of a long handle and a scraper top for ascraping tool.

2. Description of the Prior Art

For interior remodeling work like replacing carpet or wallpaper, itrequires to thoroughly remove residual materials or adhesives on wallsurface or ground surface to assure firmness and flatness. FIGS. 1 and 2show the structural disassembly diagram and assembly joint diagram for aknown scraping tool. The scraping tool generally consists of a longhandle 10 for hand grip and a flat and wide scraper top 20 in the front.The scraper top 20 forms a clip base 21 in its inner front. The clipbase 21 is equipped with a clip jaw 22 that is tightened with threescrews 23 and secures a blade 24 inside the clip base 21. Thus, theblade 24 is allowed to stick out in the front of the clip base 21. Therear of the scraper top 20 forms a threaded connecting column 26 withscrew thread 25. When the front hollow section of the long handle 10 hasa threaded hole 11, the scraper top 20 can use the threaded connectingcolumn 26 with screw thread 25 to enter the threaded hole 11 in thefront of the long handle 10 and get assembled and joined. This allows auser to grasp the front or rear section of the long handle 10 and exertforce to facilitate removal of residual materials or adhesives on wallsurface or ground surface by the blade 24. Further understanding of theassembly and joint structure for the common scraping tool reveals thefollowing drawbacks during use:

First, the scraper top 10 and the blade 24 are flat and wide and of acertain width. The joint section of the long handle 10 and the scrapertop 20 is located in the rear center of the scraper top 20. That meansthe force exerted on the long handle 10 is longitudinal and in the backof the scraper top 20. However, the scraping side of the blade 24 isunder lateral force. When the blade 24 is under lateral force, it ispossible to have unbalanced forces on either the left or the right side.The unbalanced force can affect the user in operating the long handle 10and exerting longitudinal force to cause rotation of the long handle 10and eventually unexpected loosening of the long handle 10 in the processof exerting force. As a consequence, there is a concern of separatingthe long handle 10 and the scraper top 20.

Second, the force exerted onto the long handle 10 is transmitted throughthe assembly joint section to the scraper top 20. If there is apotential for the joint section to be rotated and loosened due tounbalanced force, there will be a danger of instant separation duringthe scraping action.

The invention aims to eliminate the drawbacks in the assembly jointstructure between a long handle and a scraper top of a commonly knownscraping tool. This is also the motivation of the invention.

SUMMARY OF THE INVENTION

The objective for the invention is to provide an assembly and jointstructure of a long handle and a scraper top for a scraping tool thatthe scraper top inserts a connecting column in the rear section into aconnecting hole in the front of the long handle to prevent rotation ofthe assembly joint section.

To achieve the above objective, the invention contains a connectingcolumn of suitable length formed in the rear central section of the flatand wide scraper top. The connecting column has through holes, while thefront section of the long handle has a connecting hole of the samediameter as the outer diameter of the connecting column. On the tubularwall of the connecting hole there are corresponding through holes. Whenthe scraper top inserts the connecting column into the connecting holein the front of the long handle and results in a firm joint, rivets canbe put in the through holes to further enhance the assembly jointstructure to prevent rotation between the long handle and the scrapertop.

DETAILED DESCRIPTION OF THE INVENTION

The following figure for a preferred embodiment will describe thecharacteristics and functions for the invention:

FIGS. 3 and 4 show the structural disassembly diagram and assembly jointcross-sectional diagram for the scraping tool in the invention. Ingeneral, the scraping tool in the invention consists of a long handle 10and a wide and flat scraper top 20 in the front, as seen in atraditional scraping tool. The front of the scraper top 20 forms a clipbase 21. The clip base 21 along with a clip jaw 22 uses three screws 23to secure a blade 24 inside. The blade 24 is allowed to stick out in thefront of the clip base 21. The characteristics of the invention aredescribed as follows. The rear central section of the scraper top 20forms a connecting column 27 of suitable length with two through holes28. The front of the long handle 10 has a connecting hole 12 of the samediameter as the outer diameter of the connecting column 27. The wall ofthe connecting hole 12 has corresponding through holes 13. When thescraper top 20 inserts the connecting column 27 into the connecting hole12 in the front of the long handle 10 and results in a firm joint,rivets 14 can be put in the through holes 13 on the long handle 10 andpass through the through holes 28 on the connecting column 27 to furtherenhance the assembly joint structure to prevent rotation and separationbetween the long handle 10 and the scraper top 20. The firmness of theassembly joint structure allows the user to firmly and safely grasp thelong handle 10 and exert force to the blade 24 in removing residuals onwall surface or ground surface.

The above disclosed figure and description is only for a preferredembodiment. Any modifications or equivalent applications by those whoare familiar with the technology shall be included in the patentapplication scope.

Specific Drawing:

(1) The designated diagram for the present invention is FIG. 3.

(2) The legends for the components

10 long handle 12 connecting hole 13 through hole 14 rivet 20 scrapertop 21 clip base 22 clip jaw 23 screw 24 blade 27 connecting column 28through hole

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the structural disassembly diagram for a commonly knownscraping tool.

FIG. 2 is the assembly joint diagram for a long handle and a scraper topon a commonly known scraping tool.

FIG. 3 is the structural disassembly diagram for the scraping tool inthe invention.

FIG. 4 is the assembly joint cross-sectional diagram for a long handleand a scraper top of the scraping tool in the invention.

1. An assembly joint structure for a long handle and a scraper top of ascraping tool contains a long handle and a scraper top in the front withcharacteristics described as follows: the rear central section of thescraper top forms a connecting column of suitable length and on theconnecting column there are two through holes; in the front of the longhandle, there is a connecting hole of the same diameter as the outerdiameter of the connecting column and on the wall of the connecting holethere are corresponding through holes; the scraper top inserts the rearconnecting column into the connecting hole in the front of the longhandle and rivets are put in the through holes to constitute an assemblyjoint structure for a long handle and a scraper top.
 2. As described inclaim 1 for an assembly joint structure for a long handle and a scrapertop of a scraping tool, the rivet can be any type of fixture.
 3. Asdescribed in claim 1 for an assembly joint structure for a long handleand a scraper top of a scraping tool, the outer diameter of theconnecting column in the rear of the scraper top is equal to the innerdiameter of the connecting hole in the front of the long handle.